CN203532128U - Overflow valve for common-rail and high-pressure oil pump - Google Patents
Overflow valve for common-rail and high-pressure oil pump Download PDFInfo
- Publication number
- CN203532128U CN203532128U CN201320545458.6U CN201320545458U CN203532128U CN 203532128 U CN203532128 U CN 203532128U CN 201320545458 U CN201320545458 U CN 201320545458U CN 203532128 U CN203532128 U CN 203532128U
- Authority
- CN
- China
- Prior art keywords
- oil
- relief valve
- oil pump
- overflow
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 82
- 239000000446 fuel Substances 0.000 claims description 23
- 239000000295 fuel oil Substances 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses an overflow valve for a common-rail and high-pressure oil pump and aims at providing an overflow valve capable of achieving external oil returning and internal oil returning at the same time to obtain the appropriate returned oil quantity and to balance the oil transfer pump load on the premise of meeting the requirement for adjusting the pressure at the low-pressure end. According to the technical scheme, the front end of an overflow valve body (5) is provided with an overflow valve seat (1) communicated with an overflow valve oil inlet hole (10), a movable steel ball (2) located in an orifice of the overflow valve seat (1) is arranged between the orifice of the overflow valve seat and the front end of an overflow valve element (3), the movable steel ball (2) makes direct contact with the orifice to form a sealing zone, and the overflow valve element transmits spring force through a spring (8) making contact with a fixed steel ball (9) and presses the movable steel ball with the overflow valve seat. When the oil outside the oil pump returns, the oil inlet hole of the overflow valve and a valve element oil returning hole (6) are communicated with an oil pump external oil returning hole (7), and when the oil inside the oil pump returns, the oil inlet hole of the overflow valve, an oil pump valve body oil returning hole (4) and the valve element oil returning hole are communicated with the oil pump external oil returning hole.
Description
Technical field
The utility model relates to a kind of relief valve, specifically a kind of relief valve for common rail high pressure oil pump.
Background technique
High pressure co-rail system adopts conventionally controls the control that low pressure oil inlet quantity is realized rail pressure, and this control mode depends on two aspects: the aperture of fuel metering valve 11 and the charge oil pressure of low voltage terminal.Fuel oil enters fuel metering valve 11 front ends after oil transfer pump compression, and a part enters plunger cavity by fuel metering valve 11, after plunger compression, provides high-pressure oil feed, and remaining part is pushed relief valve 15 oil sump tanks or oil transfer pump entrance open.
Prior art adopts the structure shown in Fig. 3 conventionally, the unnecessary fuel oil that oil transfer pump provides is by relief valve oil inlet hole 9, the spring force that fuel pressure overcomes spring 8 promotes overflow spool 3, and overflow spool is along with fluctuation accumulation of energy and the release of fuel pressure, the pressure surge of damping fuel oil.When fuel pressure reaches predetermined pressure, relief valve oil inlet hole 10 and inner spill port 4 conductings, release unnecessary fuel oil, and predetermined fuel pressure regulates by stationary balls 9.Relief valve oil return has outside oil return and two kinds of modes of inner oil return conventionally, mainly according to the demand of system, chooses.Adopt the mode of outside oil return, push the fuel oil of overflow spool 3 open and finally get back to fuel tank, oil transfer pump load is larger; Adopt the mode of inner oil return, push the fuel oil of overflow spool 3 open and directly get back to oil transfer pump entrance, can be good at reducing the mechanical loss of oil transfer pump.Two kinds of relief valves are all carried out accumulation of energy and are regulated pressure by spring 8 and overflow spool 3.
Summary of the invention
The purpose of this utility model is to provide a kind of relief valve for common rail high pressure oil pump, meeting under the prerequisite that regulates low voltage terminal pressure, realizes outside oil return and inner oil return, to obtain appropriate low pressure recirculating oil quantity and the load of balanced oil transfer pump simultaneously.
The utility model solves the technological scheme that its technical problem adopts, a kind of relief valve for common rail high pressure oil pump, comprise an overflow spool 3 that connects the mesopore of overflow valve body 5 and be arranged on relief valve oil inlet hole 10 nose ends, and be arranged on the spring 8 between overflow spool 3 and overflow valve body free end inlet hole stationary balls 9 by mesopore, it is characterized in that: at overflow valve body 5 front ends, be provided with the relief valve seat 1 that is communicated with relief valve oil inlet hole 10, between relief valve seat 1 aperture and overflow spool 3 front ends, be provided with a movable steel ball 2, movable steel ball 2 is seated on relief valve seat 1 aperture, direct contact hole interruption-forming sealing strip, overflow spool 3 transmits spring force by the spring 8 contacting with stationary balls 9, push down movable steel ball 2 together with relief valve seat 1, during the outside oil return of oil pump, outside spill port 7 conductings of relief valve oil inlet hole, spool spill port 6 and oil pump, during the inner oil return of oil pump, outside spill port 7 conductings of relief valve oil inlet hole 10, valve body spill port 4, spool spill port 6 and oil pump.
The beneficial effects of the utility model are:
1, there is accumulation of energy effect, the utility model arranges and be communicated with the relief valve seat 1 of relief valve oil inlet hole 10 and the movable steel ball 2 of establishing between relief valve seat 1 aperture and overflow spool 3 front end at overflow valve body 1 front end, has effectively controlled the pressure surge of common rail high pressure oil pump low voltage terminal.
2, provide outside oil return, meet the oily demand of using of external accessory.
3, during low-pressure, relief valve is in energy accumulating state, increase along with low voltage terminal pressure, first relief valve opens outer circulation by movable steel ball 2, when pressure reaches setting value, relief valve by movable steel ball 2, open again in circulation, make it produce a large amount of inside oil returns and effectively reduce the mechanical loss of oil transfer pump.
Accompanying drawing explanation
Fig. 1 is the generalized section of the utility model high pressure oil pump relief valve.
Fig. 2 is the schematic perspective view that uses high pressure oil pump of the present utility model.
Fig. 3 is existing conventional structure of relief valve figure.
In figure: 1 relief valve seat, 2 movable steel balls, 3 overflow spools, 4 valve body spill ports, 5 overflow valve bodies, 6 spool spill ports, 7 valve pocket spill ports, 8 springs, 9 stationary balls, 10 relief valve oil inlet holes, 11 fuel metering valves, 12 oil transfer pump fuel feeding are logical, the inner drainback passage of 13 oil pumps, the outside drainback passage of 14 oil pumps, 15 relief valves, 16 are total to rail high pressure oil pump.
Embodiment
Referring to Fig. 1.A kind of relief valve 15 that is mainly used in the common rail high pressure oil pump 16 shown in Fig. 2, comprises a mesopore that connects overflow valve body 5 and the relief valve seat 1 arranging at the front end of overflow valve body 5.Relief valve seat 1 is interference fit with overflow valve body 5.Overflow valve body 5 rear end counterbores have been pressed into stationary balls 9.Overflow valve body 5 mesopores are provided with spring 8.Spring 8 contacts with stationary balls 9, and spring 8 is between mesopore overflow spool 3 and overflow valve body 5 free end inlet hole stationary balls 9.Stationary balls 9 is interference fit with overflow valve body 5, for the compression of spring 8 provides support.Relief valve 15 is assemblied in the hole body that 16 fuel metering valve 11 valve bodies of high pressure oil pump shown in Fig. 2 communicate with relief valve oil inlet hole.Fuel metering valve 11 is by oil transfer pump oil supply gallery 12 fuel feeding.Overflow valve body 5 is assemblied between the inner drainback passage 13 of oil pump that fuel metering valve 11 is provided with unidirectional valve ball.The relief valve seat hole that overflow valve body 5 valve openings arrange by front end is communicated with relief valve oil inlet hole 10, is shaped with the valve body spill port 4 of the inner drainback passage 13 of radial communication fuel metering valve 11 valve body oil pumps and the valve pocket spill port 7 that the outside drainback passage 14 of oil pump communicates on body.On overflow spool 3, be shaped with axial blind hole, before and after core body, in section, be shaped with the spool spill port 6 that can be communicated with valve body spill port 4 and valve pocket.Between relief valve seat 1 aperture and overflow spool 3 front ends, be provided with a movable steel ball 2, movable steel ball 2 is seated on relief valve seat 1 aperture, bears the spring force of the spring 8 of overflow spool 3 transmission, directly contacts with overflow spool 3 axial blind holes and forms sealing strip.Sealing band diameter and spring 8 determine the cracking pressure of relief valve.Overflow spool 3 transmits spring force by the spring 8 contacting with stationary balls 9, pushes down movable steel ball 2 together with relief valve seat 1.The movable steel ball 2 of overflow spool front end transmits from relief valve oil inlet hole 10 fuel pressures, drives overflow spool 3 Compress Springs 8, and the reaction elastic force of spring 8 is pushed down movable steel ball together with relief valve seat 1 by overflow spool 3, coordinate and form sealing area.Steel ball 2 is by overflow spool 3, and under the spring-force driven dual of spring 8, damping fuel oil fluctuates.The spring force of the diameter of overflow spool 3 and spring 8 determines the fuel pressure of conducting spool spill port 6 and outside spill port 7.Overflow spool 3, under the spring-force driven dual of spring 8, is controlled the fuel pressure of fuel metering valve 11 front ends.The spring force of the diameter of overflow spool 3 and spring 8 determines the fuel pressure of fuel metering valve 11 front ends.During the outside oil return of valve body, relief valve oil inlet hole 10, spool spill port 6 and 7 conductings of valve pocket spill port, during valve inner oil return, relief valve oil inlet hole 10, valve body spill port 4, spool spill port 6 and 7 conductings of valve pocket spill port.
Claims (7)
1. the relief valve for common rail high pressure oil pump, comprise an overflow spool (3) that connects overflow valve body mesopore and be arranged on relief valve oil inlet hole (10) nose end, and be arranged on the spring (8) between overflow spool (3) and overflow valve body free end inlet hole stationary balls (9) by mesopore, it is characterized in that: at overflow valve body (5) front end, be provided with the relief valve seat (1) that is communicated with relief valve oil inlet hole (10), between relief valve seat (1) aperture and overflow spool (3) front end, be provided with a movable steel ball (2), movable steel ball (2) is seated on relief valve seat (1) aperture, direct contact hole interruption-forming sealing strip, overflow spool (3) transmits spring force by the spring (8) contacting with stationary balls (9), push down movable steel ball (2) together with relief valve seat (1), during the outside oil return of oil pump, outside spill port (7) conducting of relief valve oil inlet hole (10), spool spill port (6) and oil pump, during the inner oil return of oil pump, outside spill port (7) conducting of relief valve oil inlet hole (10), valve body spill port (4), spool spill port (6) and oil pump.
2. the relief valve for common rail high pressure oil pump as claimed in claim 1, it is characterized in that, the relief valve seat hole that overflow valve body (5) valve opening arranges by front end is communicated with relief valve oil inlet hole (10), is shaped with the valve body spill port (4) of the inner drainback passage of radial communication fuel metering valve (11) valve body oil pump (13) and the valve pocket spill port (7) that the outside drainback passage of oil pump (14) communicates on body.
3. the relief valve for common rail high pressure oil pump as claimed in claim 1, is characterized in that, overflow spool is shaped with axial blind hole on (3), is shaped with the spool spill port (6) that is communicated with valve body spill port (4) and valve pocket before and after core body in section.
4. the relief valve for common rail high pressure oil pump as claimed in claim 1, is characterized in that, movable steel ball (2) bears the spring force of the spring (8) of overflow spool (3) transmission, directly contacts with overflow spool (3) axial blind hole and forms sealing strip.
5. the relief valve for common rail high pressure oil pump as claimed in claim 1, it is characterized in that, the movable steel ball of overflow spool front end (2) transmits from relief valve oil inlet hole (10) fuel pressure, drive overflow spool (3) Compress Spring (8), the reaction elastic force of spring (8) is pushed down steel ball by overflow spool (3) together with relief valve seat 1, coordinates and forms sealing area.
6. the relief valve for common rail high pressure oil pump as claimed in claim 1, is characterized in that, steel ball (2) is by overflow spool (3), and under the spring-force driven dual of spring (8), damping fuel oil fluctuates.
7. the relief valve for common rail high pressure oil pump as claimed in claim 1, is characterized in that, the spring force of the diameter of overflow spool (3) and spring (8) determines the fuel pressure of conducting spool spill port (6) and outside spill port (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545458.6U CN203532128U (en) | 2013-09-03 | 2013-09-03 | Overflow valve for common-rail and high-pressure oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320545458.6U CN203532128U (en) | 2013-09-03 | 2013-09-03 | Overflow valve for common-rail and high-pressure oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532128U true CN203532128U (en) | 2014-04-09 |
Family
ID=50418343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320545458.6U Expired - Fee Related CN203532128U (en) | 2013-09-03 | 2013-09-03 | Overflow valve for common-rail and high-pressure oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532128U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489572A (en) * | 2017-07-31 | 2017-12-19 | 成都威特电喷有限责任公司 | Integrated high pressure fuel feeding oil pump |
| CN111396222A (en) * | 2020-04-30 | 2020-07-10 | 北油电控燃油喷射系统(天津)有限公司 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
| CN116181539A (en) * | 2023-02-08 | 2023-05-30 | 钧风电控科技(泰州)有限责任公司 | A two-stage opening relief valve |
-
2013
- 2013-09-03 CN CN201320545458.6U patent/CN203532128U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489572A (en) * | 2017-07-31 | 2017-12-19 | 成都威特电喷有限责任公司 | Integrated high pressure fuel feeding oil pump |
| CN111396222A (en) * | 2020-04-30 | 2020-07-10 | 北油电控燃油喷射系统(天津)有限公司 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
| CN116181539A (en) * | 2023-02-08 | 2023-05-30 | 钧风电控科技(泰州)有限责任公司 | A two-stage opening relief valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110748446B (en) | Common rail high-pressure oil inlet and outlet valve assembly and common rail high-pressure oil feed pump | |
| CN104314725A (en) | Middle hole pressure storage static leakage-free oil sprayer | |
| CN203532128U (en) | Overflow valve for common-rail and high-pressure oil pump | |
| CN205744225U (en) | The common rail pump parts of single cylinder diesel high voltage common rail pump | |
| CN105952561A (en) | Common rail pump component of high-pressure common rail pump of single-cylinder diesel | |
| CN203925849U (en) | Piezoelectricity is controlled pressure accumulation constant-voltage type oil sprayer | |
| CN110848060A (en) | Electric control pressure accumulation oil sprayer | |
| CN201972916U (en) | Constant-pressure control valve for axial plunger piston pump | |
| CN105952562A (en) | Composite high-pressure common rail pump for single cylinder diesel engine | |
| CN101691854A (en) | Novel fuel pressurization pump and pressurization system | |
| CN201982265U (en) | Grading variable axial plunger pump | |
| CN204677346U (en) | Normally closed electromechanical compound high pressure oil pump | |
| CN203321921U (en) | Pilot-operated type overflow valve | |
| CN102392771A (en) | High-pressure common-rail diesel engine rail-pressure reinforcement principle and device | |
| CN210948964U (en) | Common rail high-pressure oil inlet and outlet valve assembly and common rail high-pressure oil supply pump | |
| CN104806406A (en) | Normally closed electromechanical compound high pressure oil pump | |
| CN202108631U (en) | Rail pressure enhancing pump for high-pressure common rail system of high-power diesel engine | |
| CN207879746U (en) | A kind of double pressure unloading valves | |
| CN203532126U (en) | Switching valve of high-pressure common-rail fuel injection pump | |
| CN206299503U (en) | A kind of single-cylinder air-cooled diesel engine electrical control oil spray pump | |
| CN110529640A (en) | It is a kind of can adverse current constant pressure valve | |
| CN105221315B (en) | Single cylinder diesel monomer pump assembly | |
| CN215890270U (en) | Fuel injection structure of fuel pump | |
| CN204677343U (en) | Double-acting piezoelectric normally closed electronically controlled unit pump | |
| CN203515904U (en) | Constant pressure oil outlet valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20200903 |